Spin conductance of YIG thin films driven from thermal to subthermal magnons regime by large spin-orbit torque

Abstract

We report a study on spin conductance in ultra-thin films of Yttrium Iron Garnet (YIG), where spin transport is provided by propagating spin waves, that are generated and detected by direct and inverse spin Hall effects in two Pt wires deposited on top. While at low current the spin conductance is dominated by transport of thermal magnons, at high current, the spin conductance is dominated by low-damping non-equilibrium magnons thermalized near the spectral bottom by magnon-magnon interaction, with consequent a sensitivity to the applied magnetic field and a longer decay length. This picture is supported by microfocus Brillouin Light Scattering spectroscopy.

References in corpus (23)

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• Spin Seebeck insulator
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• Magnetic field dependence of the magnon spin diffusion length in the magnetic insulator yttrium iron garnet
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• Spin-transfer torque based damping control of parametrically excited spin waves in a magnetic insulator
• Spectral non-uniform temperature, non-local heat transfer, and the spin Seebeck effect
• Thermally-driven spin torques in layered magnetic insulators
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Cited by in corpus (28)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
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• Spin Insulatronics
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• Spin transport in a magnetic insulator with zero effective damping
• Emission of coherent propagating magnons by insulator-based spin-orbit torque oscillators
• Electrical properties of single crystal Yttrium Iron Garnet ultra-thin films at high temperatures
• Pure spin currents in magnetically ordered insulator/normal metal heterostructures
• Ferromagnetic Resonance Studies of Strain tuned Bi:YIG Films
• Differences in the magnon diffusion length for electrically and thermally driven magnon currents in Y${}_3$Fe${}_5$O${}_{12}$
• Spin-dependent (inverse) spin Hall effect in Co${}_{60}$Fe${}_{20}$B${}_{20}$
• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Microwave control of thermal magnon spin transport
• Nonlinear longitudinal and transverse magnetoresistances due to current-induced magnon creation-annihilation processes
• Short-range Thermal Magnon Diffusion in Magnetic Garnet
• From Chaotic Spin Dynamics to Non-collinear Spin Textures in YIG Nano-films by Spin Current Injection
• Quantitative comparison of magnon transport experiments in three-terminal YIG/Pt nanostructures acquired via dc and ac detection techniques
• Enhancement of YIG$|$Pt spin conductance by local Joule annealing
• Focused ion beam modification of non-local magnon-based transport in yttrium iron garnet/platinum heterostructures
• Estimation of spin-orbit torques in the presence of current-induced magnon creation and annihilation
• Non-reciprocity in magnon mediated charge-spin-orbital current interconversion
• Non-local magnon-based transport in yttrium iron garnet/platinum heterostructures at high temperatures
• Non-local magnon transconductance in extended magnetic insulating films.\\ Part I: spin diode effect
• Electrically induced angular momentum flow between separated ferromagnets
• Impact of electromagnetic fields and heat on spin transport signals in Y${}_3$Fe${}_5$O${}_{12}$
• Non-local magnon transconductance in extended magnetic insulating films.\\Part II: two-fluid behavior
• Electrical manipulation of spin pumping signal through nonlocal thermal magnon transport
• Spin-accumulation induced magnetic texture in a metal-insulator bilayer